EP3530779B1 - Dispositif et procédé de réglage d'une distance de travail entre un tambour et au moins un élément de travail adjacent dans une machine de préparation à la filature - Google Patents

Dispositif et procédé de réglage d'une distance de travail entre un tambour et au moins un élément de travail adjacent dans une machine de préparation à la filature Download PDF

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Publication number
EP3530779B1
EP3530779B1 EP19156815.3A EP19156815A EP3530779B1 EP 3530779 B1 EP3530779 B1 EP 3530779B1 EP 19156815 A EP19156815 A EP 19156815A EP 3530779 B1 EP3530779 B1 EP 3530779B1
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EP
European Patent Office
Prior art keywords
working
sma
cylinder
drum
working distance
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EP19156815.3A
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German (de)
English (en)
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EP3530779A1 (fr
Inventor
Martin Dovern
Christoph Färber
Andreas Sobotka
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Truetzschler GmbH and Co KG
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Truetzschler GmbH and Co KG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/28—Supporting arrangements for carding elements; Arrangements for adjusting relative positions of carding elements

Definitions

  • the invention relates to a device on a spinning preparation machine, in particular a card or card, with a garnished drum and at least one working element adjacent thereto, the drum and the working element interacting at a working distance.
  • the device comprises an adjusting device which acts on a bearing of the drum or the working element in order to adjust or readjust the working distance between the drum and the working element during operation of the machine.
  • the invention also relates to a method for setting such a working distance, according to the preamble of claim 12.
  • Carding gaps and roller spacings are of great importance in a card: The carding and thus the yarn quality depends on an exact setting and also on compliance with this gap (roller gap).
  • the rollers can expand radially under the influence of heat and as a result of centrifugal forces, which leads to a change in the gap dimensions.
  • high production quantities and the processing of carding-intensive types of fibers or fiber blends can also lead to strong heating of the rollers, which further increases the thermally induced dimensional changes in the rollers.
  • the roller spacings remain constant when the card is in operation.
  • constant means that the change in distance should preferably be less than 0.01 mm.
  • A1 shows a generic device on a card or card according to the preamble of claim 1.
  • This device is used to set a working distance between the drum and at least one adjacent roller of a card.
  • the device comprises an adjusting device with which a distance between the drum and an adjacent roller can be set or kept constant.
  • the adjusting device is actuated by actively supplying or removing heat energy, for example by a Peltier element attached to the adjusting device and supplied with electrical energy.
  • a Peltier element attached to the adjusting device and supplied with electrical energy.
  • another disadvantage of such an adjustment device is that the supply or removal of thermal energy for the Adjusting device takes place only indirectly through the Peltier element and may not be precise and fast enough.
  • the WO2017 / 178148 discloses a combined pull / push element which can be inserted into the cavity of a carding element. It is disclosed that at least part of the combined tension / compression element should have a shape memory alloy. With the combined tension / compression element, the evenness of the carding rod or its bending can be influenced.
  • the DE 2803477 describes an electrical heating device for a web guide element in order to increase the temperature of the web guide element when the card starts up.
  • the invention is based on the knowledge that at increased temperature the sliding properties of certain fibers are improved.
  • the tension rod or parts of it can be made of a bimetal which, with different coefficients of thermal expansion, cause the tension rod to bend or recede.
  • the JP 60231827 discloses the use of a shape memory alloy in which a hinge is formed at the end of a partition or a fleece guide element with a shape memory alloy.
  • the shape memory alloy as a joint is heated by a power supply so that the end piece of the partition can fold up or down and thus change the distance to the roller.
  • the invention is based on the object of developing a spinning preparation machine in such a way that an adjustment of a working distance between the drum and an adjacent working element is possible automatically and / or with greater precision.
  • the invention achieves the object set by a device with the features specified in claim 1, and by a method according to claim 10.
  • Advantageous developments of the invention are defined in the dependent claims.
  • a device on a spinning preparation machine in particular a card or carding machine, such a machine having a garnished (tambour) drum and at least one working element which is arranged adjacent to the drum.
  • a working element can be formed from a garnished doffer roll, or e.g. also from a flat bar, a fixed bar, a lickerin roller, a cleaning element or a suction hood.
  • the drum and the working element work together at a working distance. If the working element is formed from a garnished doffer roller, this interaction takes place between the cylindrical surfaces of the drum and roller at the fiber transfer points.
  • the device according to the invention comprises an adjusting device which acts either on a bearing of the drum or a bearing of the working element in order to thereby set or readjust the working distance between the drum and the working element during operation of the spinning preparation machine.
  • the invention includes the technical teaching that the actuating device has at least one shape memory alloy element (for short: SMA element). This means that such an SMA element can at least be part of the actuating device.
  • the actuating device can preferably also be formed or manufactured from at least one SMA element or from several such SMA elements.
  • the invention also provides a method for setting a working distance between a garnished drum and at least one for this purpose adjacent work element in a spinning preparation machine.
  • the working distance between the drum and the working element is set or readjusted during operation of the spinning preparation machine using at least one SMA element.
  • the invention is based on the essential knowledge that on the basis of the SMA element, which is either part of the actuating device or of which the actuating device consists, whose property as a solid body actuator is used to determine the working distance between the drum and the working element when the spinning preparation machine is in operation to readjust.
  • the material parameters (e.g. the coefficient of linear expansion) of the SMA element are selected in such a way that when the spinning preparation machine has reached its operating temperature and there is a thermal expansion of the drum and an adjacent working element compared to the cold state of the machine, the SMA- Element experiences a change in length as a result of the increased operating temperatures, and thereby the working distance between the drum and the working element adjoining it is adjusted or kept constant.
  • the SMA element can be calibrated or designed in its property as a solid-state actuator in such a way that it reaches a predetermined value when there is a change in its ambient temperature Has change in length.
  • This calibration is suitably matched to the increase in temperature of the spinning preparation machine in its operating state compared to the cold state, possibly also taking into account the location of the machine and the climatic conditions prevailing there.
  • the SMA element has a positive coefficient of linear expansion.
  • a change in length of the SMA element increases with increasing temperatures.
  • the SMA element (with a positive or negative coefficient of linear expansion) can be in operative connection with the mounting of the working element via a lever mechanism with reverse kinematics.
  • reverse kinematics means that a linear expansion of the SMA element leads to a reduction in the working distance between the working element and the drum.
  • an additional cooling device is expedient here, with which the SMA element is specifically and actively acted upon with a cooled fluid (air, gas, liquid) when the machine is in operation.
  • the resulting contraction of the SMA element then leads, taking into account the aforementioned reversal kinematics, to a desired increase in the distance between the working element and the drum in order to appropriately adjust the working distance or keep it constant.
  • the SMA element can be connected to an electrical voltage source.
  • an electrical voltage By applying an electrical voltage, it is therefore possible to control, preferably regulate, a change in length of the SMA element as a function of the applied voltage. This effect can be superimposed with the change in length of the SMA element caused by the change in temperature. As a result, it becomes for the SMA element a faster response behavior (or a lower inertia) is achieved, in connection with a higher precision for the manipulated variable of the SMA element, ie its resulting change in length.
  • an electrical voltage to the SMA element it should be noted that it is useful here to measure the actual position of the working element relative to the drum with a suitable sensor, in particular a displacement transducer or a distance meter.
  • the speed of the drum can be measured with a sensor.
  • the voltage applied to the SMA element can then be regulated by means of a control device, taking into account the measured actual position of the working element or the measured speed of the drum, in order to adjust the current working distance between the drum and the working element to a predetermined target value .
  • the working element which is arranged adjacent to the drum, can be a particularly garnished doffer roller, a flat bar, a fixed bar, a lickerin roller, be a cleaning element or a suction hood.
  • the device according to the invention can also be provided with several such working elements in order to readjust the respective working distance of the individual working elements to the drum when the machine is in operation.
  • the optional application of an electrical voltage to the SMA element and / or the targeted application of a cooled fluid (air, gas, liquid) to the SMA element improves the response of the device according to the invention to dynamic changes during production (e.g. temperature increases, and also changed speeds or centrifugal forces).
  • a device 100 which is intended for use on a spinning preparation machine (for example a card or card) for cotton, chemical fibers or the like.
  • a spinning preparation machine for example a card or card
  • the same features in the drawing are each provided with the same reference symbols.
  • the drawing is only shown in a simplified manner and, in particular, without a scale.
  • the spinning preparation machine in which the device 100 according to the invention is used can be a card K, which is shown in FIG Fig. 1 is shown in a side view.
  • the center (or the bearing axis) of the drum 4 is designated by M 1
  • M 2 the center point (or the bearing axis) of the pick-up roller 5 is designated.
  • the directions of rotation of the rollers are in Fig. 1 indicated by curved arrows, the arrow 4b indicating the direction of rotation of the drum 4 and the arrow 5b the direction of rotation of the doffer roller 5.
  • the direction of rotation of the revolving flat 13 in the carding position is denoted by C
  • the direction of return transport is denoted by D.
  • the device 100 comprises an actuating device 102 which is formed from a shape memory alloy element (abbreviated: SMA element) 110 is.
  • SMA element 110 is made of a metallic shape memory material which, when sufficient temperature changes occur, enables reversible deformations of 8-10%, for example, and is available as a nickel-titanium alloy, for example.
  • Fig. 2a shows a side view of the SMA element 110, which can be designed as an elongated rod.
  • Figure 2b illustrates an alternative embodiment for the actuating device 102, the SMA element 110 - as in FIG Figure 2b shown in perspective - is designed as an elongated sleeve.
  • the SMA element 110 can furthermore also be designed in the form of a wire (not shown) or a sheet metal.
  • FIG. 3 shows - in principle simplified - parts of the card K of Fig. 1 namely the drum 4, the adjoining pick-up roller 5, their attachment to a stationary frame device 20, and the interaction with the actuating device 102.
  • the actuating device 102 In detail:
  • the frame device 20 comprises a total of four supports, of which in Fig. 3 only the front two supports 21a and 21b are shown. Between the supports 21 there are each horizontal longitudinal members 22, of which in Fig. 3 only the front is shown. Using cross members (not shown) which are each attached between the two longitudinal members 22 at their ends, the frame device 20 thus forms a stable and rigid support structure on which the drum 4 and the doffer roller 5 are rotatably mounted.
  • FIG Fig. 3a Details regarding the attachment of the doffer roller 5 to the frame device 20 are given in FIG Fig. 3a shown.
  • the support elements 25 are not screwed to the longitudinal girders 22, but are guided on them in a translatory manner, e.g. by using prismatic guides 26.
  • the supporting elements 25 can be moved along the longitudinal girders 22 in the direction of the drum 4 or away from it, e.g. by a distance of 1 to 2 mm.
  • each fixed stops 27 ( Fig. 3a ) is provided, between such a fixed stop 27 and a support element 25 each having an adjusting device 102 according to FIG Fig. 2 is appropriate.
  • the SMA element 110 of the actuating device 102 has a positive coefficient of linear expansion.
  • threaded connections can be provided, with which the adjusting device 102 is firmly anchored in the support element 25 and the stop 27.
  • the actuating device 102 acts directly on the support elements 25 in order to move the bearing axis M 2 of the pick-up roller 5 and to adjust the working distance a between the tip sets 4a and 5a in the event of a longitudinal expansion of the SMA element 110, ie an expansion or contraction .
  • the adjusting device 102 is positioned in the card K in such a way that it is not directly connected to the bearing axis M 2 of the doffer roller 5, but rather via a lever mechanism.
  • the lever mechanism enables a translation with which the travel that results from a change in length of the SMA element 110 can be increased.
  • This lever mechanism works as follows: In the embodiment of Fig. 4 the drum 4 is fixedly attached to the frame device 20, as already explained above. In contrast, the bearing axis M 2 of the pick-up roller 5 is attached to one end of a rotary arm 51. The other, opposite end of the rotary arm 51 is articulated about a stationary rotary bearing 50 provided on the frame device 20.
  • the rotary arm 51 can thus be pivoted about the rotary bearing 50 away from the drum 4 (see arrow H) or in the direction of the drum 4 (see arrow I).
  • Another stationary pivot bearing 54 is provided, to which the actuating device 102 (with a positive coefficient of linear expansion) is hinged at one end.
  • This rotary bearing 54 is - with respect to the rotary arm 51 - positioned between the rotary bearing 50 and the drum 4, ie on a side of the rotary arm 51 which faces the drum 4.
  • the other opposite end of the actuating device 102 is articulated with a joint 52 on the rotary arm 51, for example in a central section of the rotary arm 51.
  • the Rotary arm 51 is pivoted about rotary bearing 50 in the direction of arrow H, as a result of which the bearing axis M 2 of the pick-up roller 5 is moved away from the drum 4 and the working distance a between the tip sets 4a, 5a then increases.
  • the bearing axis M 2 of the doffer roller 5 is also provided at one end of the rotary arm 51, the opposite end of which is rotatably mounted on the stationary rotary bearing 50.
  • a further stationary rotary bearing 53 is now positioned on one side of the rotary arm 51 which is opposite to the drum 4 or facing away from it.
  • the adjusting device 102 is hinged at one end to the rotary bearing 53, the opposite end of the adjusting device 102 being hinged to the rotary arm 51 by the joint 52. To this extent, this lever mechanism has reverse kinematics.
  • the SMA element 110 of the actuating device 102 can have a negative coefficient of linear expansion. This means that with an increase in the temperature which acts on the actuating device 102, the SMA element 110 then contracts or contracts, as a result of which the rotary arm 51 is pivoted about the rotary bearing 50 in the direction of the arrow H, as explained. In the same way as with the Fig. 4 the working distance a between the tip sets 4a, 5a is thereby increased.
  • Such a changed position of the joint 52 on the rotary arm 51 can also have the effect that, with possibly only very small changes in length of the SMA element 110, a sufficient adjustment path for the bearing axis M 2 of the doffing roller 5 is achieved to readjust the working distance a.
  • FIG Fig. 6 Another embodiment of the invention is in the side view of FIG Fig. 6 clarified.
  • the drum 4 - in the same way as in the Fig. 3 -
  • the doffer roller 5 is arranged laterally adjacent to the drum 4 on a separate support frame 28.
  • the vertical supports 21 ′ on which the horizontal supports 22 are supported have adjusting elements 102 with at least one SMA element 110 (with a positive coefficient of linear expansion) or are formed by adjusting elements 102 of this type.
  • the working distance a between the tip clothing 4a, 5a, which are attached to the cylindrical outer circumferential surfaces of the drum 4 and the doffer roller 5 is large Significance, as well as the speeds set for this and the type of tip sets 4a, 5a provided.
  • An optimal value for the working distance a can be in a range of approx. 0.05 mm ⁇ a ⁇ 0.3 mm.
  • the lower limit is not due to technology, but is only to be adhered to in order to avoid mutual contact or disturbance of the opposite tip sets 4a, 5a.
  • the working distance a is extremely small compared to the dimensions of the drum 4 or the doffing roller 5.
  • the enlargements in diameter for the drum 4 or the doffer roller 5 caused by the increase in the operating temperature can be approximately in the order of magnitude of approx. 0.08 mm per 10 ° C. increase in temperature. Similar deformations can be caused by the influence of the centrifugal force during the rotation of the drum 4 or the doffer roller 5.
  • the invention now works as follows: The setting of the carding gap between the drum 4 and the working elements of the card adjoining it is initially carried out with the machine at a standstill, in a relatively cold state. This also includes the working distance a between the drum 4 and the doffer roller 5. After the card K has been started up, its operating temperature increases in comparison with the cold state. As explained, this increase in temperature leads to thermal expansion or enlargement of the diameter of the drum 4 and the doffer roller 5, possibly superimposed by a radial deformation as a result of centrifugal forces.
  • a lickerin roller 3c is rotatably mounted on a separate support frame 29 in a stationary manner.
  • the adjustment mechanism explained above according to which in the event of a temperature increase due to the linear expansion of the SMA elements 110, the horizontal girders 22, and thus also the support elements 24 together with the drum 4, are raised vertically upwards, then also causes the working distance to be adjusted b between the drum 4 and the lickerin roller 3c (cf. Fig. 6 ).
  • an electrical voltage can be applied to the actuating device 102, and thus to the SMA element 110.
  • the actuating device 102 is electrically connected to a voltage source 112.
  • Creating a Electrical voltage to the SMA element 110 has a positive effect on the actuator properties of the SMA element 110, ie its linear expansion then increases.
  • the SMA element 110 can be actively controlled, preferably regulated, by applying an electrical voltage.
  • the actuating device 102 used here is in accordance with the embodiment of FIG Fig. 7 can be actively controlled, namely by applying an electrical voltage. This then also has an effect on the linear expansion of the SMA element 110 in its function as a solid-state actuator.
  • the device 100 includes further components, for example sensors 114 and 115, a controller 116, a setpoint adjuster 118 and optionally also a disturbance variable input element 120 These components are integrated into a control loop that is Fig. 8 is illustrated.
  • a speed sensor 115 can also be provided with which the current speeds of the drum 4 and the doffing roller 5 can be measured.
  • the sensor 114 and / or the sensor 115 are electrically connected to the controller 116 (e.g. a PID controller) as a measuring element, which receives the measured variables determined on the card K (current working distance a, and / or speeds of drum 4 and doffer roller 5, as the actual value).
  • a setpoint adjuster 118 (for example a memory) is assigned to the controller 116, for specifying the desired working distance a, as a setpoint or reference variable.
  • To the controller 116 is electrically connected to the voltage source 112, to which a manipulated variable is output by the controller 116, namely for setting the voltage that is to be applied to the actuating device 102. This manipulated variable or voltage is then output to the adjusting device 102 (or the SMA element 110) connected to the voltage source 112.
  • the nominal value of the working distance a is given by the calculations from the drum speed and the temperatures of the drum 4 and the environment. Details on this are already known from the prior art, for example from DE 10 2006 002 812 A1 of the applicant.
  • the actual position of the pick-up roller 5 in relation to the drum 4 is measured via the sensor 114.
  • the controller 116 compares this actual position with the predefined setpoint value and accordingly regulates the voltage that is applied to the actuating device 102. This causes the SMA element 110 to expand in length, so that, as explained, the working distance a is readjusted.
  • Interferences such as B. the change in ambient temperature can adversely affect the working distance a now reached. This can be detected by the disturbance variable input element 120 (e.g. a temperature sensor), the sensor 114 in turn measuring this change in the working distance a and the controller 116 readjusting it again, whereby the control loop is closed.
  • the disturbance variable input element 120 e.g. a temperature sensor
  • an SMA element 110 with a positive coefficient of linear expansion can also be used.
  • a cooling device 122 is then provided, which is positioned adjacent to the actuating device 102, and with which the actuating device 102 is selectively connected to a cooled fluid (air, gas, liquid) can be applied.
  • a cooled fluid air, gas, liquid
  • a contraction of the SMA element 110 is achieved, whereby the rotary arm 51 is also pivoted in the direction of the arrow H about the rotary bearing 50. This then leads to the desired readjustment of the working distance a.
  • the volume flow of cooled air or gas that is generated by the cooling device 122 to act on the actuating device 102, and / or the temperature of the air or the gas, which are required for adjusting the working distance a, can also be adjusted by means of the control loop of Fig. 8 be managed.

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  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (13)

  1. Dispositif (100) sur une machine de préparation à la filature, tout particulièrement une carde (K) ou carde à rouleaux, avec un tambour garni (4) et au moins un élément de travail (5) avoisinant, le tambour (4) et l'élément de travail (5) coopérant dans une distance de travail (a), comportant un dispositif de réglage (102), qui agit sur un support (M1) du tambour (4) ou un support (M2) de l'élément de travail (5), pour régler, respectivement ajuster la distance de travail (a) entre le tambour (4) et l'élément de travail (5) pendant l'opération de la machine de préparation à la filature, caractérisé en ce que le dispositif de réglage (102) comprend au moins un élément d'alliage à mémoire de forme (élément AMF 110) en forme d'une tige oblongue ou d'un manchon oblong, l'élément AMF (110) étant calibré en ce qu'il présente un changement de longueur prédéterminé lors d'un changement de température.
  2. Dispositif (100) selon la revendication 1, caractérisé en ce que l'élément AMF (110) comprend un coefficient positif de dilatation linéaire, de préférence que le dispositif de réglage (102) agit directement sur le support (M1) du tambour (4) ou sur le support (M2) de l'élément de travail (5), en plus de préférence que le dispositif de réglage (102) agit sur le support (M2) de l'élément de travail (5) via un mécanisme de leviers (50, 51) de telle façon qu'une dilatation linéaire de l'élément AMF (110) aboutit à une augmentation de la distance de travail (a).
  3. Dispositif (100) selon la revendication 1, caractérisé en ce que l'élément AMF (110) comprend un coefficient négatif de dilatation linéaire, le dispositif de réglage (102) coopérant avec le support de l'élément de travail (5) via un mécanisme de leviers (50, 51) avec cinématique inversé de telle façon qu'une contraction de l'élément AMF (110) aboutit à une augmentation de la distance de travail (a).
  4. Dispositif (100) selon l'une des revendications précédentes, caractérisé en ce que, lors qu'un changement de température d'opération de la carde (K) ou de la carde à rouleaux se présente, un réglage, respectivement ajustement de la distance de travail (a) entre le tambour (4) et l'élément de travail (5) est effectué automatiquement par le changement de longueur de l'élément AMF (110) sans pour autant requérant un paramètre de commande électrique étant nécessaire pour l'élément AMF (110).
  5. Dispositif (100) selon la revendication 1, caractérisé en ce que l'élément AMF (110) comprend un coefficient positif de dilatation linéaire, le dispositif de réglage (102) coopérant avec le support de l'élément de travail (5) via un mécanisme de leviers (50, 51) avec cinématique inversé de telle façon qu'une contraction de l'élément AMF (110) aboutit à une augmentation de la distance de travail (a), un dispositif de refroidissement (122) étant prévu lequel soumet l'élément AMF (110) de façon ciblée à l'action de fluide refroidi (air, gaz, liquide).
  6. Dispositif (100) selon l'une des revendications 1 à 5, caractérisé en ce que l'élément AMF (110) est raccordé à une source de tension électrique (112) de sorte qu'un changement de longueur de l'élément AMF (110) est contrôlable, de préférence réglable en fonction de la tension appliquée.
  7. Dispositif (100) selon la revendication 5 ou 6, caractérisé en ce qu'est prévu un capteur (114), tout particulièrement un capteur de déplacement ou un télémètre, lequel peut mesurer une position réelle de l'élément de travail (5) par rapport au tambour (4) et en ce qu'est prévu un régulateur (116), lequel règle la tension appliquée à l'élément AMF (110) et/ou le dispositif de refroidissement (122) est réglé en tenant compte de la position réelle mesurée de élément de travail (5) pour ajuster la distance de travail (a) actuelle entre le tambour (4) et l'élément de travail (5) à une valeur consigne prédéterminée.
  8. Dispositif (100) selon l'une des revendications 5 à 7, caractérisé en ce qu'est prévu un capteur (115), lequel peut mesurer un nombre de tours du tambour (4), et en ce qu'est prévu un régulateur (116), lequel règle la tension appliquée à l'élément AMF (110) et/ou le dispositif de refroidissement (122) est réglé en tenant compte du nombre de tours mesuré du tambour (4) pour ajuster la distance de travail (a) actuelle entre le tambour (4) et l'élément de travail (5) à une valeur consigne prédéterminée.
  9. Dispositif (100) selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un élément de travail est aménagé d'un barreau de chapeau (14), d'un barreau fixe, d'un rouleau briseur (3a, 3b, 3c), d'un élément de nettoyage, d'une hotte d'aspiration et/ou d'un rouleau peigneur garni (5).
  10. Procédé pour régler une distance de travail (a) entre un tambour garni (3) et au moins un élément de travail (5) y avoisinant sur une machine de préparation à la filature, tout particulièrement une carde (K) ou carde à rouleaux, le tambour (4) et l'élément de travail (5) coopérant dans la distance de travail (a), comportant un dispositif de réglage (102), qui est aménagé à agir sur un support (M1) du tambour (4) ou un support (M2) de l'élément de travail (5) pour régler, respectivement ajuster la distance de travail (a) entre le tambour (5) et l'élément de travail (5) pendant l'opération de la machine de préparation à la filature, caractérisé en ce que la distance de travail (a) entre le tambour (4) et l'élément de travail (5) pendant l'opération de la machine de préparation à la filature est réglée, respectivement ajustée en utilisant au moins un élément d'alliage à mémoire de forme (élément AMF 110) en forme d'une tige oblongue ou d'un manchon oblong, l'élément AMF (110) étant calibré en ce qu'il présente un changement de longueur prédéterminé lors d'un changement de température.
  11. Procédé selon la revendication 10, caractérisé en ce que, lors qu'un changement de température d'opération de la carde (K) ou de la carde à rouleaux se présente, le réglage, respectivement l'ajustement de la distance de travail (a) entre le tambour (4) et l'élément de travail (5) est effectué automatiquement par un changement de longueur de l'élément AMF (110).
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce qu'une tension électrique est appliquée à l'élément AMF (110), pour ainsi réaliser un changement de longueur de l'élément AMF (110) et pour régler, respectivement ajuster la distance de travail (a).
  13. Procédé selon la revendication 12, caractérisé en ce qu'une position réelle de l'élément de travail (5) en relation au tambour (4) et/ou un nombre de tours du tambour (4) sont mesurés/est mesuré, la tension appliquée à l'élément AMF (110) étant mesurée au moyen d'un régulateur (116) en considérant la position réelle mesurée de l'élément de travail (5) et/ou le nombre de tours mesurés du tambour (4) étant réglé pour ajuster la distance de travail (a) actuelle entre le tambour (4) et l'élément de travail (5) à une valeur de consigne prédéterminée.
EP19156815.3A 2018-02-23 2019-02-13 Dispositif et procédé de réglage d'une distance de travail entre un tambour et au moins un élément de travail adjacent dans une machine de préparation à la filature Active EP3530779B1 (fr)

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CN114314493B (zh) * 2022-01-07 2023-03-31 锡林郭勒职业学院 一种抗菌羊绒被的生产工艺

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EP3530779A1 (fr) 2019-08-28
CN110184692B (zh) 2022-03-11
CN110184692A (zh) 2019-08-30

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